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Overmolding

We mold rubber directly over another part, a metal insert, a plastic housing, or a sub-assembly, to add grip, sealing, or protection in one step. This removes assembly operations and creates a single, integrated component.

Engineering considerations

  • Adhesion to dissimilar substrates (metal, thermoplastic)
  • Insert tolerancing, fixturing, and flash control
  • Cycle-time and tooling strategy for multi-material parts
  • Bond verification across the substrate interface

Common materials